Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89e500f9572b84a9fc754d61637b99bfafc135682a3767870eb0da235b73a559' 
  AND token = 'mK4iPvinP+dhtJOxLcNtHHy7wwfQzArUiNwleZLBo20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}